cbs and abc news reported american officials in libya had asked for more security personnel, but the state department refused. meanwhile, libyan officials said president obama's top counterterror advisor, john brennan, will be in libya tomorrow to discuss the investigation. a warning from congress today: u.s. companies should stop doing business with china's top two telecommunications firms, huawei technologies and z.t.e. the house intelligence committee reported both have close ties to the government of china. it said using their components in u.s. computer networks could let them steal trade secrets or even shut down vital systems in a time of crisis. the two firms denied any such association to the chinese government. venezuela's leftist president hugo chavez will serve another six years after winning reelection sunday. his margin of victory was ten points, the narrowest in his 14 years in power. it was a bitterly fought race against challenger henrique capriles, who conceded defeat. chavez welcomed that concession last night, as supporters poured into the streets and surrounded t